unzip/zlib isn't 100% reliable

[ghost]

I'm trying to use your zlib function to deflate image data and it's not coming out 100% correct. What I end up is about 90% of a the correct image, then 10% where it looks corrupted because there wasn't enough data.

For example, I'm deflating the alphaData on a JPG with alpha. The alphaData.length is 141,143 where as the number of pixels in the image is (imgData.data.length) is 141,198, so i'm missing 55 pixels worth of alpha data.

Any idea why this could be happening?